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In: Computer Science

MIPS ASSEMBLY LANGUAGE (I'm using MARS) Can you provide me with the code of this, without...

MIPS ASSEMBLY LANGUAGE (I'm using MARS)

Can you provide me with the code of this, without using DIV

(4a-b)%[(2+c)/d] (a,b,c,d are user inputs)

Expert Solution

Given, Asked to write a MIPS assembly code to convert the equation without using division operator.

Explanation: As asked in question not to use division operator I used substraction logic to divide the equation then get the equation part by part. Please check the below code for exact functionality.

MIPS Code:

divide:
addiu $sp,$sp,-24
sw $fp,20($sp)
move $fp,$sp
sw $4,24($fp)
sw $5,28($fp)
lw $2,24($fp)
nop
srl $2,$2,31
andi $3,$2,0x00ff
lw $2,28($fp)
nop
srl $2,$2,31
andi $2,$2,0x00ff
xor $2,$3,$2
andi $2,$2,0x00ff
beq $2,$0,$L2
nop

li $2,-1 # 0xffffffffffffffff
b $L3
nop

$L2:
li $2,1 # 0x1
$L3:
sw $2,12($fp)
lw $2,24($fp)
nop
bgez $2,$L4
nop

subu $2,$0,$2
$L4:
sw $2,24($fp)
lw $2,28($fp)
nop
bgez $2,$L5
nop

subu $2,$0,$2
$L5:
sw $2,28($fp)
sw $0,8($fp)
b $L6
nop

$L7:
lw $3,24($fp)
lw $2,28($fp)
nop
subu $2,$3,$2
sw $2,24($fp)
lw $2,8($fp)
nop
addiu $2,$2,1
sw $2,8($fp)
$L6:
lw $3,24($fp)
lw $2,28($fp)
nop
slt $2,$3,$2
beq $2,$0,$L7
nop

lw $3,12($fp)
lw $2,8($fp)
nop
mult $3,$2
mflo $2
move $sp,$fp
lw $fp,20($sp)
addiu $sp,$sp,24
j $31
nop

$LC0:
.ascii "%0.2f\000"
main:
addiu $sp,$sp,-64
sw $31,60($sp)
sw $fp,56($sp)
move $fp,$sp
li $2,7 # 0x7
sw $2,24($fp)
li $2,3 # 0x3
sw $2,28($fp)
li $2,6 # 0x6
sw $2,32($fp)
li $2,2 # 0x2
sw $2,36($fp)
lw $2,24($fp)
nop
sll $3,$2,2
lw $2,28($fp)
nop
subu $2,$3,$2
mtc1 $2,$f0
nop
cvt.s.w $f0,$f0
swc1 $f0,40($fp)
lw $2,32($fp)
nop
addiu $2,$2,2
lw $5,36($fp)
move $4,$2
jal divide
nop

mtc1 $2,$f0
nop
cvt.s.w $f0,$f0
swc1 $f0,44($fp)
lwc1 $f0,40($fp)
nop
cvt.d.s $f0,$f0
lwc1 $f2,44($fp)
nop
cvt.d.s $f2,$f2
mov.d $f14,$f2
mov.d $f12,$f0
jal fmod
nop

cvt.s.d $f0,$f0
swc1 $f0,48($fp)
lwc1 $f0,48($fp)
nop
cvt.d.s $f0,$f0
mfc1 $7,$f0
mfc1 $6,$f1
lui $2,%hi($LC0)
addiu $4,$2,%lo($LC0)
jal printf
nop

move $2,$0
move $sp,$fp
lw $31,60($sp)
lw $fp,56($sp)
addiu $sp,$sp,64
j $31
nop

Please let me know in the comments if you need more help in this.

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